[linux] "Fast TSC calibration failed" warning message with 3.15.5-1

after upgrading to linux 3.15.5-1 I notice a warning message on boot after rebooting :

"Fast TSC calibration failed"

it's a random bug, sometimes this warning message is not diplayed,

before upgrading to linux 3.15.5-1 I never saw this message on my PC ( pentium dual-core E6800, chipset intel P31, archlinux 64 bits ), the only time where I can see this message it's on a virtualbox machine ( archlinux 32 bits ),

I had been noticing the fast tsc calibration failed message at boot for quite a long time on my old Samsung Q35 which is a BIOS boot netbook with arch running the x86 system. The message has continued to show up through many kernel updates including 3.17.4-1-ARCH.

After doing a bit of research I found a simple solution to getting rid of this warning during boot. In my case I use grub as the bootloader and that is where a workaround is possible.

I edited the following two lines in /etc/default/grub to add in "clocksource=tsc":